Романтика без правил

On her dad’s birthday, a drunken Eun Jae clashes with Park Moo Yul, the "Red Dreamers" second baseman, over her loyalty to the rival "Blue Seagulls." Their brawl goes viral, jeopardizing both their careers. To control the damage, they pretend Eun Jae is Moo Yul’s bodyguard and that the video was a self-defense demo. Forced to keep up the act, Eun Jae becomes his real bodyguard—but they can’t stand each other.

(Source: MyDramaList)